fontlint
    A program for checking the validity of fonts
  
  
  fontlint fontfile1 ...
  
  fontlint checks a font for certain standard problems
  
  It will notice:
  
    - 
      Any glyphs with intersecting (or self-intersecting) contours.
    
- 
      Any contours drawn in the wrong orientation
    
- 
      Any glyphs with a flipped reference
    
- 
      Missing points at extrema.
  
  For sfd fonts it will also notice:
  
    - 
      Any open contours (more an issue in sfd files than in released fonts)
    
- 
      Adjacent points too far apart in a glyph
    
- 
      Unknown glyph referenced in GSUB/GPOS/MATH
  
  For PostScript fonts it will also notice:
  
    - 
      More points in a glyph than allowed by PostScript.
    
- 
      Too many hints in a glyph.
    
- 
      Invalid glyph name.
    
- 
      Missing BlueValues entry in PostScript Private dictionary
    
- 
      Odd number of elements in either the BlueValues or OtherBlues entries in
      the PostScript Private dictionary.
    
- 
      Disordered elements in either the BlueValues or OtherBlues entries in the
      PostScript Private dictionary.
    
- 
      Too many elements in either the BlueValues or OtherBlues entries in the
      PostScript Private dictionary.
    
- 
      Elements too close in either the BlueValues or OtherBlues entries in the
      PostScript Private dictionary (must be at least 2*BlueFuzz+1 apart).
    
- 
      Non-integral elements in either the BlueValues or OtherBlues entries in the
      PostScript Private dictionary.
    
- 
      Alignment zone height in either the BlueValues or OtherBlues is too big for
      the BlueScale in the PostScript Private dictionary.
    
- 
      Odd number of elements in either the FamilyBlues or FamilyOtherBlues entries
      in the PostScript Private dictionary.
    
- 
      Disordered elements in either the FamilyBlues or FamilyOtherBlues entries
      in the PostScript Private dictionary.
    
- 
      Too many elements in either the FamilyBlues or FamilyOtherBlues entries in
      the PostScript Private dictionary.
    
- 
      Elements too close in either the FamilyBlues or FamilyOtherBlues entries
      in the PostScript Private dictionary (must be at least 2*BlueFuzz+1 apart).
    
- 
      Non-integral elements in either the FamilyBlues or FamilyOtherBlues entries
      in the PostScript Private dictionary.
    
- 
      Alignment zone height in either the FamilyBlues or FamilyOtherBlues is too
      big for the BlueScale in the PostScript Private dictionary.
    
- 
      Bad BlueFuzz entry in PostScript Private dictionary.
    
- 
      Bad BlueScale entry in PostScript Private dictionary.
    
- 
      Bad StdHW entry in PostScript Private dictionary.
    
- 
      Bad StdVW entry in PostScript Private dictionary.
    
- 
      Bad StemSnapH entry in PostScript Private dictionary.
    
- 
      Bad StemSnapV entry in PostScript Private dictionary.
    
- 
      StemSnapH does not contain StdHW value in PostScript Private dictionary.
    
- 
      StemSnapV does not contain StdVW value in PostScript Private dictionary.
    
- 
      Bad BlueShift entry in PostScript Private dictionary.
    
- 
      Bad 'CFF ' table.
  
  For TrueType fonts it will also notice:
  
    - 
      More points in a glyph than specified in 'maxp'
    
- 
      More paths in a glyph than specified in 'maxp'
    
- 
      More points in a composite glyph than specified in 'maxp'
    
- 
      More paths in a composite glyph than specified in 'maxp'
    
- 
      Instructions longer than allowed in 'maxp'
    
- 
      More references in a glyph than specified in 'maxp'
    
- 
      References nested more deeply than specified in 'maxp'
    
- 
      Bad 'glyf' or 'loca' table
  
  In any sfnt (True or OpenType font):
  
    - 
      Bad sfnt table header, bad file/table checksums, overlapping tables, standard
      tables with incorrect lengths, etc.
    
- 
      Bad PostScript fontname entry in the 'name' table
    
- 
      Bad 'hhea', 'hmtx', 'vhea' or 'vmtx' table
    
- 
      Bad 'cmap' table
    
- 
      Bad 'EBDT', 'bdat', 'EBLC' or 'bloc' (embedded bitmap) table
    
- 
      Bad Apple GX advanced typography table
    
- 
      Bad OpenType advanced typography table
    
- 
      Bad version number in OS/2 table (must be >0, and must be >1 for OT-CFF
      fonts)
  
    See Also
  
  
  FontForge